Balancing-table.



w. n. POMEBOY. BALANCING TABLE.

APPLICATION FILED MON. 30, 1906.

1,136,61 1. Pa ented Apr. 20, 1915.

2 SHEETS-SHEET 1.

lllllll W. D. POMEROY.

BALANCING TABLE.

APPLICATION nuzo NOV. so. 1906.

Patented Apr. 20, 1915.

2 SHEETS-*SHEET 2.

mg we/Mw Mum Q. vomerwig which the following is a full,

I of Ohio,

7 WILLIAM ID. roMERoY, OF no a F cE.

woon, oHIo, AssIGNon; BY :omncrr AND MESNE ASSIGNMENTS, TO ALLI S GHALMEBS MANUFACTURING COMPANY, A COR- l PORATION OF DELAWARE; I

To all whom it may concern I Be it known that I, WILLIAM D. PoMERoY, citizen of the United States, residing at Norwood, in the county of Hamilton and State have invented certain new and useful Improvements in Balancing-Tables, of clear, and exact specification. My invention relates to balancing machines or devices for objects intended to be rotated at high speeds.

When a body such 'as awheel or disk is to be rotated at very high speeds iti's essential that it be first carefully balanced in'order that there may be no serious vibration at high speeds. This unbalanced condition may be due to an unequal distribution of the metal or to a greater density of the metal at one place-than at another. The increased speeds to whichrotating bodies are being subjected render necessary a more accurate balancing than has heretofore been necessary or obtainable.

' which fectly The object of my invention is to provide a balancing machine or. device which. its simple in construction and operation and permits rotary members to be, perbalanced easily and quickly. My invention consists in certain novel de tails of construction and combinations and arrangements of parts described in the specification and 'set forth in the appended claims.

' For a better understanding of my inventlon, reference is had to the accompanying drawings in which? Figure '1 is a. perspectivel view of my im,-.

proved balancing machine, Fig. 2 is'a sectional elevation of the same, the section be '40 ing taken approximately along the 1ine2-2 of Fig. 3; Fig. 3 is a plan view of the same; Fig. 4 is anenlarged sectional View of the beating employed; Fig. 5.is an elevation of V I a ball cage employed in the bearing; Fig.

6 is an enlarged sectional elevation of the device for multiplying the mov'ementpf the balancing table; and Fig. 7 is 'a section of v the. same along the line 7,7 of Fig. 6.

Referring now, to the figures of the drawing, 10 represents a stationary supporting frame or table whichrestsupon legs 11, in

this case three in number. The table is provided in this instance with an outer circular flange 12, a hub 13, radial ribs 14, and With Specification of Letters Patent.

that the friction of cage is free t BAL A lvtlI NGsTABLE.

Patented Apr. 20,1915.

Application filed ember so, 1906. Serial No. 345,608.

a flat bottom the stationary table is a vertical bearing post 17 provided with a portion which extends into the opening of.

he hub 13 is' provided with a circular flange 16, the purpose of which will be explained later. Supported by the hub 13 of 12 is provided with a machined flat top 21, radial ribs 22, an outer flange 23, an inner flange 24, and a hub-like extension 25 at the center. The movable balancing table is su ported at its center "upon the stationary ta le 10 so as to be able to tilt relatively thereto in any direction. As is shown, ing which .receives the upper end of bearing post 17. The hub-like extension 25 is recessed and is providedwith abearing block 26 having a spherical socket 27. The balancing table is supported, in. this case, by a spherical hearing which is so constructed the engaging parts is almost negligible and which therefore permits very accurate balancing. The bearing consists of an inner sphere or ball 28, (see- Figs. 2,4 and 5) a surrounding, hollow, spherical, perforated, bearing-cage 29 and a number of smaller ball-bearings 30 located within the perforations 30*? of the cage and extending beyond the inner and outer peripheries of the'latte'r so as to bear on the inner ball 28and againstthe walls of the spherically curved sockets in the bearing posts 17- and bearingblock 26. The ballcage preferably consists of two parts 29 and 29 which are screw th're'adedtogether as shown in Fig.4. It is seen that the ball: turn in all directions with the table. The purpose of the ball-cage is to prevent the balls frombeing crowded away from the bottom of the socket in the bearing pos 1 y a The upper edge ofthe bearing post and the lower edge of the bearing block are close within the flange 24 is an open-- together, there being only a suflicient clear ance between the two to prevent contact when the table is tilted. It may be stated that the table is intended to move from the horizontal position only a. very small amount, the movement being limited by the tal table 10 are three downwardly extend equally spaced bolts 32 which carry at ing,

plate 33.. The 'holes their lower ends a through which the bolts 32 pass are sufii' ciently large to permit the bolts to move with the balancing table 20 in any direc 38 by a gimbaljoint 'so as to be capable of p tion. Securely fastened to the center of the plate, in this case. being screw threaded thereto, so as to be in line with the center of the movable balancing table and at right angles thereto, is a downwardly extending spindle 34.. The spindle is threaded and carries a heavy'adjustable weight 35. The

purpose of this weight is to bring the center of gravity of the balancing table and of the j rotary. object being balanced, belowthe center of the bearing. The spindle also serves another purpose, namely, to transmit the movement of the balancing table to an, in-

dicating needle or .rod 36 which multiplies w or enlarges the movement of the table. Theindicating needle is supported on a U-shapd frame consisting of two vertical bolts 37 secured to the stationary supporting frame or table on opposite sides of the flange 13,

and a horizontal cross piece 38 supported on the lower ends of the bolts. The needle,

in this case, is supported on the cross piece universal movement. The supporting ofthe indicating needle is shown clearly in Fig. 6.. Secured on the, cross piece, 38 is a plate :39 a

which is provided with an opening vertically below the center of the balancing 'table. Supported in this opening by two diametrically opposite .pins 40 isa ring 41.

The needle is pivoted to thisring by pins 43 atopposite sides thereof and arranged in a plane at right angles to the plane of the pins 40.. Thus it is seen that the movement of the table is conveyed to the needle throughthespindle 34. It is seen that with,

this construction, an universal movement can be given the needle about a point which is the intersectionof the axes of the pivotal pins 40 and 43. As is clearly shown in Fig. 6 the needle is provided with an enlarged spherical end-portion .44 above the gimbal tilting of said movable table.

joint, and the lower end of the s'pindle 34 is providedwith a spherical'socket into which the upper slight-movement of the spindle 34 will be multiplied many-times at the lower end-of the needle and this movement can 'be indicatedon a plate 45 directly below thecenter of the table- As is shown in Fig. '6, the needle consists of two portions screwed together at 46.

that the spindle 34* and needle36 are yer tical, after which the member to be balanced is placed on the'movable table20 and cennot perfectly balanced, the table will assume a position 'at an angle to the horizontal,. and

end 44 of the-needle is located. -Th'e length of the needle above the pivot or .axis of movement is very, much smaller than the length below the axis so that .avery The table is first 'carefullybalanced so tered thereon. If the object on the table is the movement of the table -will be trans-.

mitted to the needle 36. 4 Weights can now be added to the lighter side of the member being balanced or one or more holes can be drilled into the Heavier side until the needle assumes a vertical position and a perfect balance is obtained. With my improved balancing machine just described, a very.

slight unbalanced condition of the-material composing the rotary memberbeing tested can be detectedby the needle and conse-' qucfitly a perfect balance can be obtained.

I do not .wish to be confined to the exaict details shown but aim inmy claims to cover all modifications which do not depart from the spirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent.is:--'

1. In a balancing horizontal frame or support, a movable table. above and supported at its'center on said stationaryframe so' as to be capable T of tilting in any direction, said movable table having an upper-surface for supporting the article to'be balanced, a spindle extending downwardfrom said movable table in line with its center and at right angles to the table, a'weight adjusta'bly mounted on saidv spindle, and means, for mdicating the 2. In a balancing device, a stationary device, a stationary horizontal frame or support, a movable table above'and supported on said frame at .its center so as to be ca able of tilting in all directions, said mova le table having an upper surface for supporting the. article to be balanced and means for indicating the position of said table comprising a spindle extending downward therefrom in line with its center and at right angles thereto and a' weight adiustably mounted on said spindle.

3. In a balancing device, a stationary frame or support, a movable table, a ball and socket omt-supporting' said movable table on said frame or support and permit-.

ting an universal movementof-said table, said movable table havin for supporting the artifie to be balanced, and means for indicating the movement vof said table.

4. In a, balancing device, 'a stationary frame or table, a bearing-support at its cen--. ter having a spherical shaped socket, a movable table having also at its center a' spherical shaped socket, said movable table having an upper surface for .supporting the article to be balanced, a spherical bearing resting in the first named socket and supporting said table and means for indicating the movement of the movable table.

5. In a balancing device, a stationary frame or table having a spherical shaped bearing at its center, a movable table with an upper surface for supporting the article to be balanced, said movable table having a spherical shaped bearing socket resting on said bearing, means forexcluding dust or dirt from said bearing, and means for indicating the movements of said latter table.

6. In a balancing device, a stationary frame, a movableta'ble supportedon said stationary frame so as to be-capable of tilting'in all directions, said movable table having an upper surface-for supporting an article to be balanced, means for excluding dust or dirt from. the bearing surfaces of said frame and table, and means for indicating the movements of said table.

' 7. In a'balancing device, a stationaryframe or table, a movable table supported at its center-on said stationary table so as to be capable of tilting in any direction, said movable table having an upper surface for .supporting the article to be balanced and means for excluding dust on dirt from the bearing surfacescomprising a liquid filled annular receptacle on said stationary table and a ring or circular flange on said movable table and extending downward into the said receptacle. I v

8. In a balancing device, a stationary table, a movable, table supported onsaid stationary table and having an. upper surface for supporting the article to be balanced, each of said parts having oppositely an upper surfacedisposed spherical shaped sockets, a bearwithin said sockets, said bearing comprising a comparatively large ball r sphere and a plurality of smaller balls, and means for indicating the movement of said movabletable. e

9. In a balancing device, a stationary table, a movable table supported on said stationary table and having an upper surface for supporting the article to be ,bal-

, anced, each of said tables having oppositely disposed spherical shaped sockets, a bearing I in said sockets, said bearing comprising .a' large inner ball or sphere and a plurality .of spaced smaller balls surrounding. the

large ball, and means for indicating the position of said movable table.

10. In 'a balancing device, a stationary table and a movable table supported on said stationary table and having an upper surface for supporting the article to be balanced, eachof said tables having oppositely disposed spherical shaped sockets, a bearing in said sockets, said bearing comprising a large inner ball or sphere, a plurality of.

spaced smaller balls surrounding the large ball, and a cage for the smaller balls, and means for indicating the position of said movable table.

11. In a balancing device, a stationary table, a movable table supported on said stationary table and having an upper surface for supporting the article to be balanced, each of said tables having oppositely disposed spherical sha ed sockets, a bearing in said sockets, said 'earing' comprising a large inner ball or sphere, a hollow spherical cage surrounding the ball or sphere, said evice operatedby said mov'-' 

